Personally I think any new characters added into the game should
1. Be heavies and vanguards
2. Should break the current idea of what that class is, e.g every vanguard has a twohanded weapon ?!?!?!?

Theses are my ideas

Viking - Brawler - heavy - two punch daggers/gauntlets

Viking - vanguard - tribal/cheiftan - two chains w/ gauntlets and blades on the end, not ranged like shinobi.

Knight - vanguard/heavy - reaver - two maces his story would be that knights take captured enemies, break their minds and turn them into reavers.

Knight - vanguard - inquisitor/witch hunter - axe and sheild his shield would mostly help with offense so ne full block etc

samurai - vanguard/assassain(but pls vanguard) - monk - bo staff

camurai - Heavy - oni - katana and sheild/ other defensive weapon